Use WhoIs lookup anytime you want to perform a search to see who owns a domain name, how many pages from a site are listed with Google or even search WhoIs address listings for a website's owner.
The word act, as used in the term Act of Congress, is a common, not a proper noun. The capitalization of the word act is deprecated by some dictionaries and usage authorities. Some writers, in particular the U.S. Code, capitalize Act.
Proper Names. The words association, building, center, club, conference, department, division, hall, office, senate, street, etc. should be capitalized when used as part of an official title. On second reference, do not capitalize these words when used alone to refer to that specific group or place.